1. Department of Ecology & Evolutionary Biology University of Michigan 830 North University Avenue Ann Arbor MI 48109‐1048 USA
2. Department of Plant and Microbial Biology University of Minnesota‐Twin Cities 1445 Gortner Avenue St. Paul MN 55108 USA
3. Department of Plant Sciences University of Cambridge Cambridge CB2 3EA UK
4. Department of Biology Oberlin College Science Center K111, 119 Woodland Street Oberlin OH 44074‐1097 USA
5. Institute of Computational and Mathematical Engineering (ICME) Stanford University 475 Via Ortega, Suite B060 Stanford CA 94305‐4042 USA
6. School of Biological Sciences Victoria University of Wellington Kelburn Parade Kelburn Wellington 6012 New Zealand
7. Department of Research, Conservation and Collections Desert Botanical Garden 1201 N. Galvin Pkwy Phoenix AZ 85008 USA
8. Institut für Molekulare Physiologie Johannes Gutenberg‐Universität Mainz D‐55099 Mainz Germany
9. Institut für Molekulare und Organismische Evolutionsbiologie Johannes Gutenberg‐Universität Mainz D‐55099 Mainz Germany
10. Sukkulenten‐Sammlung Zürich / Grün Stadt Zürich Mythenquai 88 CH‐8002 Zürich Switzerland
11. Departamento de Botánica Universidad Nacional Autónoma de México Apartado, Postal 70‐367 04510 Mexico City Mexico